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ICMP is the |
ICMP is the '''I'''[[Internet|nternet]] '''C'''ontrol '''M'''essage '''P'''[[:Category:Protocols|rotocol]] |
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You can read [http://info-x.co.uk/rfcview.asp?id=792 RFC 792] for a full explanation. |
You can read [http://info-x.co.uk/rfcview.asp?id=792 RFC 792] for a full explanation. |
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Revision as of 19:04, 19 July 2006
ICMP is the Internet Control Message Protocol
You can read RFC 792 for a full explanation.
The well-known ping command is a type of ICMP request.
Packet Layout:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-------------------------------+-------------------------------+
| Type | Code | Checksum |
+-------------------------------+-------------------------------+
| Identifier | Sequence Number |
+-------------------------------+-------------------------------+
| Data ...
+---------------------------------------------
Type 8 = echo request. Type 0 = echo reply.
Links: